$$ \begin{aligned} x-11 &= 14+4x&& \text{move the $ \color{blue}{ 4x } $ to the left side and $ \color{blue}{ -11 }$ to the right} \\[1 em]x-4x &= 14+11&& \text{simplify left and right hand side} \\[1 em]-3x &= 25&& \text{ divide both sides by $ -3 $ } \\[1 em]x &= -\frac{25}{3}&& \\[1 em] \end{aligned} $$
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